will cause new reactions. niceroony, that's junior high school knowledge, yeah, anyone takes a science course. what we wanna know is why all that energy, and i have a model for you to consider. and it has to do with mass. see on the table here, i have-- oh, it's imagination time. look, i have all the 92 elements in the periodic table that's found commonly in the earth's crust, almost all 92, are all arranged here. see the hydrogen here? see the hydrogen atom? what's this one here? helium. helium. what's this one? lithium. lithium. i got no names, but you can just kinda look at them, right? what's the next one? i keep running after you. i know what the last one is. you guys know what the last one is, 92? begins with u. uranium. uranium. excellent. okay. and so i have all the atoms all lined up here. can you see them? at least in your mind's eye. now what i'm gonna do is i'm gonna shake the atoms. i'm gonna take the hydrogen-- just the nucleus of the atom, okay? i take the hydrogen, i shake it back and forth, okay? now, it's harder to shake the helium. how come? because it has more mass. there'